Seismic response analysis of a concrete gravity dam

Two-dimensional seismic responses of a concrete gravity dam under action of frequent and rare earthquakes were analyzed and influences of water level conditions on dynamic response of the dam were compared.The results show that under the frequent earthquake load the stress-strain relationship is basically in elastic deformation phase,while under the rare earthquake load,maximum seismic displacement occurs at the top of the dam,and with the increase of water level,displacement at top of the dam and dynamic stress at the dam heel decrease,and stress at the off slope of the dam changes slightly.